By the time Mr Trump and his retinue landed in a fleet of four military helicopters, however, the wind had changed. Mr Trump is an instinctive autocrat who demands supremacy in the Western Hemisphere but might not permanently erase US democracy. And while neither Mr Trump nor Mr Putin wants it back, they are both mortal men. Six months ago, Mr Trump might have pulled off this brazen attempt to hijack the UN, at least for a while. Mr Trump has taken to calling Prime Minister Carney "Governor" Carney again, and Canadians know what that may imply.